4.17 server travel crashes in multiplayer

I actually solved the problem by looking at the log but I thought it would be a good idea to report this. Basically I have a Map and a Map Icon in my lobby to display what map to chose from when starting a game. They are both the same name like FireLands.png and FireLands.umap. And for some reason when I do server travel it goes in and chooses FireLands file over server. I don’t know if this is a hierarchy in the folders problem but I can reproduce it 100% in my editor. If I change name to FireLandsIcon then it works as intended.

[2017.09.18-14.01.56:747][769]LogWorld: Warning: SetActiveLevelCollection attempted to use an out of date NetDriver: GameNetDriver
[2017.09.18-14.01.56:763][770]LogWorld: Warning: SetActiveLevelCollection attempted to use an out of date NetDriver: GameNetDriver
[2017.09.18-14.01.56:780][771]LogWorld: Warning: SetActiveLevelCollection attempted to use an out of date NetDriver: GameNetDriver
[2017.09.18-14.01.56:796][772]LogWorld: Warning: SetActiveLevelCollection attempted to use an out of date NetDriver: GameNetDriver
[2017.09.18-14.01.56:813][773]LogWorld: Warning: SetActiveLevelCollection attempted to use an out of date NetDriver: GameNetDriver
[2017.09.18-14.01.56:830][774]LogWorld: Warning: SetActiveLevelCollection attempted to use an out of date NetDriver: GameNetDriver
[2017.09.18-14.01.56:847][775]LogWorld: Warning: SetActiveLevelCollection attempted to use an out of date NetDriver: GameNetDriver
[2017.09.18-14.01.56:862][776]LogEngine: Server switch level: /Game/_MC/Assets/UI/FireLands?listen
[2017.09.18-14.01.56:863][776]LogNet: Browse: /Game/_MC/Assets/UI/FireLands?listen
[2017.09.18-14.01.56:863][776]LogLoad: LoadMap: /Game/_MC/Assets/UI/FireLands?listen
[2017.09.18-14.01.56:863][776]LogNet: World NetDriver shutdown IpNetDriver_4 [GameNetDriver]
[2017.09.18-14.01.56:863][776]LogNet: DestroyNamedNetDriver IpNetDriver_4 [GameNetDriver]
[2017.09.18-14.01.56:863][776]LogExit: GameNetDriver IpNetDriver_4 shut down
[2017.09.18-14.01.56:884][776]Cmd: MEM
[2017.09.18-14.01.56:902][776]LogMemory: Platform Memory Stats for Windows
[2017.09.18-14.01.56:902][776]LogMemory: Process Physical Memory: 1074.25 MB used, 2231.77 MB peak
[2017.09.18-14.01.56:902][776]LogMemory: Process Virtual Memory: 2418.57 MB used, 2598.75 MB peak
[2017.09.18-14.01.56:903][776]LogMemory: Physical Memory: 5532.07 MB used,  2566.63 MB free, 8098.70 MB total
[2017.09.18-14.01.56:903][776]LogMemory: Virtual Memory: 3400.44 MB used,  2566.63 MB free, 134217728.00 MB total
[2017.09.18-14.01.56:903][776]LogMemory: 
[2017.09.18-14.01.56:903][776]Allocator Stats for TBB: (not implemented)
[2017.09.18-14.01.56:905][776]LogWindows: Windows GetLastError: The operation completed successfully. (0)
[2017.09.18-14.01.57:364][776]LogWindows: Error: === Critical error: ===
[2017.09.18-14.01.57:364][776]LogWindows: Error: 
[2017.09.18-14.01.57:364][776]LogWindows: Error: Assertion failed: NewWorld [File:D:\Build\++UE4+Release-4.17+Compile\Sync\Engine\Source\Runtime\Engine\Private\UnrealEngine.cpp] [Line: 10233] 
[2017.09.18-14.01.57:364][776]LogWindows: Error: 
[2017.09.18-14.01.57:364][776]LogWindows: Error: 
[2017.09.18-14.01.57:364][776]LogWindows: Error: 
[2017.09.18-14.01.57:364][776]LogWindows: Error: KERNELBASE.dll!0x00000000BA513C58
[2017.09.18-14.01.57:365][776]LogWindows: Error: UE4Editor-Core.dll!0x00000000886514B4
[2017.09.18-14.01.57:365][776]LogWindows: Error: UE4Editor-Core.dll!0x000000008843AD5B
[2017.09.18-14.01.57:365][776]LogWindows: Error: UE4Editor-Core.dll!0x00000000883D0179
[2017.09.18-14.01.57:365][776]LogWindows: Error: UE4Editor-Engine.dll!0x00000000827BDF5E
[2017.09.18-14.01.57:365][776]LogWindows: Error: UE4Editor-Engine.dll!0x0000000082776758
[2017.09.18-14.01.57:365][776]LogWindows: Error: UE4Editor-Engine.dll!0x00000000827DD331
[2017.09.18-14.01.57:365][776]LogWindows: Error: UE4Editor-UnrealEd.dll!0x000000008012BF40
[2017.09.18-14.01.57:365][776]LogWindows: Error: UE4Editor-UnrealEd.dll!0x00000000809BCEE6
[2017.09.18-14.01.57:366][776]LogWindows: Error: UE4Editor.exe!0x000000002560534A
[2017.09.18-14.01.57:366][776]LogWindows: Error: UE4Editor.exe!0x0000000025613970
[2017.09.18-14.01.57:366][776]LogWindows: Error: UE4Editor.exe!0x00000000256139EA
[2017.09.18-14.01.57:366][776]LogWindows: Error: UE4Editor.exe!0x00000000256202D9
[2017.09.18-14.01.57:366][776]LogWindows: Error: UE4Editor.exe!0x0000000025621C47
[2017.09.18-14.01.57:366][776]LogWindows: Error: KERNEL32.DLL!0x00000000BAF88364
[2017.09.18-14.01.57:366][776]LogWindows: Error: ntdll.dll!0x00000000BD477091
[2017.09.18-14.01.57:366][776]LogWindows: Error: ntdll.dll!0x00000000BD477091
[2017.09.18-14.01.57:366][776]LogWindows: Error: 
[2017.09.18-14.01.57:382][776]LogExit: Executing StaticShutdownAfterError
[2017.09.18-14.01.57:409][776]LogWindows: FPlatformMisc::RequestExit(1)
[2017.09.18-14.01.57:409][776]Log file closed, 09/18/17 23:01:57

My original place for the map is current in /Game/_MC/Maps/FireLands?listen

Other info is that this was a 4.16 project updated to 4.17. Don’t know if that will help.

Those files shouldn’t conflict but it could be because the asset streamer doesn’t filter the extensions.
So this must be a bug indeed.